Belt shifter



Dec. 8,1925- I R. E. RICHTER BELT snm'ran Filed April 7. 1924 3Sheets-Sheet INVENTOR AT RNEY Dec. 3/1925 1.564.447

' R. E. RICHTER BELT smmzaa Filed April 7, 1924 a Sheets-Sheet 21,564,447 R. E. RICI -ITER BELT suxm'sn Filed April 7. 1924 sSheets-Sheet a BEST AVAZLABLE COPY Patented Dec. 8, 1925.

end-mew s -mc eje jer itnwttitxfi NEW JERSEY.

:eE IET' sun-Ten.

'ipplication filed Aprilfl, 1924 Serial No. 704,594

To allevhom itmzay'cmzce-m. 7

[Be it known that I, ROBERTE, RICHTER, a eitize'n-of the United Stet-esand, a resident ;otiNe'\vurk, count of Essex, and State of =NGW3JB1SQ),have invented 'ceitain new and dSQf-Ul l-n'iprovements iii-BeltShifters, of

This invention relates to an imprbvedhelt shifter to be used 011 coneypulleys :andis adept-ed to shift the belteasily andisithus --sa-fe. touse as 110 extierne :pressut 'e need be applied in -eheilging =the-belttroin Zone size ipu-lley to the other. The operator 'is not brought intodirect contact with the'helt =texeept by a lirinslidable shifter"equipped with e ha hdle foritseasy operation The invention illustratedin )the accom- 'panying drawings in which Figure, 1'. :is n {perspectiveview ot the belt-shifter inv use. Figure ii-tee section with the:eerriegewttlie -shifteirinelevetioit "Figure 3 is a section; on

liii'e in Figure 2. :Eigui'e 4; isimdetail.

ot a belt engaging; part with the carriage a'ndFr-gfurefi 8; sectionOllfllIlG 5-5 in' Fig- I jui'e Figure 6 is a 's'ectioir'on line .6-6

in -:Figure 2 mid Figures. 7 and 8 :a-re views showing u modification ofconnection lietw'een the carriage and one (if 'the belt-engaging'devices. Figure 9 isu side iew-0f a niodilied "form of eohstruotioii.Figure-'10 -;is-h:fr0nt view of the construction shown in Figure 9.Figure 11 is a View partly diagran'nimtic toshow the relative:positioiis of the horizontal arms of the frame;

In Figures 1 to SI showthebeltshifter 'as ZLISGCL'QH zrsmall lathe whichhasthe-cone pulley 1O driven from the cone pulley llby the belt-1Q. Thenshifting a belt 'runn'ing over-a cone pulley the first shift is-on-thecone pulley where the belt passes to the smaller pulley-and then on theother cone pulley to step the belt up on the larger pulley;

Thet is doiie in this ease by :ziicerria-ge o i-rrying' belt eng'agingdevices and :the; earriageis'mount-ed on a suitable' beneli-,:=fioo"r orwall support or on the inztehilie itself. The supportis illustratedmounted on the benclfi'ilzFi gures l to Q fifird 'comprises iiosts l3and A and on this mounted a horizontel U-cheped frame, usuellv formed ofpipe and having the side 2111115 15 and the cross arn 16 The brackets 17provide for both horizontal and vertical adjustment holding the sidearms in adjusted position by the ion the belt.

screws 18 and holding the Whole fut-me on the posts by :the screws 19.

On. thethorizontalIframe is secured a vertical U-sha-ped frame with theventiealiai-ms 20 mndtheeross firmiZl. This frame is adjustableomthe'si'dearms-15 by means of the eonplingsi 22 which .fll'ie held inadjusted position by thie-serews' 23,.

Thecrossarnis 16 and 2l tormithe holders '"t'or the-'efii triztgefwhiehconsists of'zslides 24 and 25- which .--s1i 1e flteely'ionzlthe, :crfissarms,

:and the f rod 126, which isfisuppor'ted. by? the Zsl-idest 24 and 25fend is held i ag'ainst lXilOVE- tree .lntivement in the slide" 25 'asit must necessarily vtfivist' cor :rotate slightlyin On eachendeofrthe'roarri 'e *are the beltengaging devices and .315-t esebeingusually open lebp's formed :by fiat rfingers 32 spaced apart "to permit"their being {pla'oed lllte xievices =30 and 31 are secured to thecollersfi3-hnd F34 respectively :Atljziceht i to 'the 11011818133 and'34: "are the stop collars ?35 and "36, respeeti'vely. Each step cbllarhs mifee'ess .37 and the cellars 33 an-d34zlieve hi s 34:ttoentertlie'se recesses to *liniitlthegswingiiig *movement of collars relativeto the 10d 26, as tlie'steip collars "are sect-recitethearod'liy'scre'ws 3B.

The distance iof Jswin iii g movement can be .a'djus'ted'by.thendjustmgscrews 39-whieh are iel'iaiigezdrstaligentially'in the st pcollars end {form sthe azbut iefit apt-one "end of the slotz37. i WSuitable retuinihg 'collar's'40 are fastened to itheirod L26; to fh'dldthe eelh 're' 3 and '34; in engagement Withthe stop "e'olla'irs, beingheld in iibs' tinnim the foamy the -'screws:4 1.

When i the device set "up it is arranged entlie'diustedsoith'a'tttherodi 26 sl' he's'letemt- 1y between the r elesiojfehefiaatve d'tlie iottvslideflfifitlfi; paralielatbe iirie'i'shmat Etgiee vghich is- -stlbstantitmy parallel with the pitoh of the conepulley and a better showing of this is in Figure 11 in which the lowercross arm 16 is on the line bb substantially parallel with the angle ofthe cone pulleys indicated by line c--n but I. find that in operationthe upper cross arm 21 must be arranged at an angle convergin toward theline 15 1) "and ind1- cated by te line a-a particularly if there is adifference in the angle of the other cone pulley, that is, the uppercone pulley. In other words, the slides 24 and 25 do not work exactlyparallel this being possible because the rod 26 slides freely androtates freely in the slide 25.

Assuming the belt to be running and m position, the belt shifting loopsor devices 31 and 30 ride free of the belt. Assuming from theillustration in Figure 1 that the lathe on the bench is to be runfaster, the handle 28 would be shifted to the right, this 1 would carrythe rod 26 with it and the collar 33 that carries the loop 30 cannotmove in a rotative direction as its lug 34 is at its limit of movementin one direction, that is, it cannot swingto the left looking at thedevice from-"the front. It thus carries the belt over'the smaller conepulley, the rod 26 moving with it but the upper device 31 and its collar34 can swing to the left which retards theistrain on the belt at thispoint the belt being momentarily slaekened at this point due to itsbeing dropped on the smaller pulley below, but does exercise enoughinfluence on the belt to cant it and it immediately rides over the edgeof the next succeeding larger pulley on the cone pulley 11. The beltshifter operates the same whether the cone pulleys are run at a high orslow speed.

In the movement to the left, the reverse takes place since the upperdevice 31 carries the belt with it'on the initial movement of the rod 26and the lower device swings to the right for the proper limited distanceand the belt being momentarily slacked at this point due to its beingdropped on a smaller pulley up above, it is easily canted on to the nextsucceeding larger pulley of the cone pulley 10.

Instead of the adjusting screws 39, various adjustments can be providedby the construction shown in Figures to 8. In this form the stop collarsuch as 35, would havea series of recesses 43, these recesses being ofvarious lengths such as the one at a which is the narrowest, the one atI) being longer. that at 0 being still longer, and that at (i being thelongest. By placing either one of these recesses over the lug 34 of thecorresponding collar, various arcs of movement can be provided for thebelt shifting device relative to the rod.

In Ifigures 9 and 10 I illustrate a modified form n which the uprightposts 13 and 14 backwardly.

BEST AVAILABLE COPY are fastened directly to the machine itself, beingslidable in the parts 45 supported from the brackets 46 and held invarious ad usted positions b the screws 47. As to the belt shifter itsef, I mount .on the lower slide 24 and the upper slide 25, separatedsleeves which receive the double rods 48 in lieu of the single rod 26.End plates 49 at the top and bottomof the carriage support the rods 20onto which the belt-engaging. devices are secured similar to thatdescribed for securing them to the ends of the rods 26. In a larger andheavier construction as herein shown, the upper slide 25 is aided in itsfree movement by the upper horizontal bar-21 as shown in Figure 11 beingplaced parallel with the upper cone angle the difference between thecone angles being thus compensated for by this disposition of the uppercross arm 21. The carriage can thus slide freely on two rods notparallel since the upper slide is without restraining means and the rods48 can slide freely therein and can also revolve freely therein. Withthis form of frame the adjustment is easy and the installation is simplebecause the T-joint 22 on each end of the upright frame is a right angleto the T joint 22 at the top of the frame on each side, and thisarrangement prevents tilting in any direction, either sidewise,forwardly or is equipped with the rod 26 and when the rod 26 andits'carriages are slid the frame so adjusts itself that the rod 21assumes the proper angle. lVhen this is accomplished the set screws 23are tightened to keep the parts in place and to prevent too muchplay orrattling but are not absolutely essential to the assembly of the frame.

Minor changes can be made in the form and arrangement of the partswithout departing from the scope of the invention.

I claim:

A belt shifter comprising a stand formec of posts, a horizontal U-shapedframe secured to the posts and adjustable vertically and horizontallythereon, a vertical U-shaped frame secured to the horizontal frame,slides on the cross arms of the U-shaped frames, 9. rod secured in theslides, a collar on each end of the arm and having a limited rotation onthe rod, and a beltengaging loop on each collar.

In testimony that I claim the foregoing, I have hereto set my hand, this13th day of March, 1924.

' ROBERT E. RICHTER;

When first erected the frame

